24 



Jfiad small, imicli narrower than the thorax, puhorbicular, rather flat, dusky 

 rufescent, with two small longitudinal channels on the disc, furnished in front 

 and on the sides with tine hair. 



Epigtoina transversely linear. 



fjaliriim very small, transverse, semielliptieal. 



Mau(Ublts moderately long, narrow, arcuate, pointed, but not dentate. 



Mtuilhe and mrntum large, forming a single organ, distinguished from each other 

 by a supertieial channel on each side, together occupying more than half of the 

 under side of the head. MaxilliB ovate, without any visible lobe. 



MaxilUirji piiljii prominent, three-jointed ; one very short ; two rather longer ; three 

 slender, as long as the preceding two. 



Labium short, transverse, very faintly emarginate. 



Labial pnlpi small, biarticulate, extending slightly beyond the second joint of the 

 maxillary palpi. 



All these organs are rufescent. 



Aiitfitiue inserted on the sides of the head, moderately long, four-jointed ; one short 

 and thick ; two slightly longer : three nearly as long as the preceding two, 

 furnished at its extremity with three or four small hairs ; four, the longest of 

 all, slender, and furnished with one long and two or three shorter hairs. 

 Below each antenna and opjiosite to its base there is a round ocellus. 



Protlioni.r nearly twice as long as the head, rather narrowed anteriorly, deeply 

 bisinuated at the sides, with a large subtriangular brown spot on the disc, 

 divided in the middle by a whitish longitudinal line, with an indistinct 

 transverse fold near the posterior margin. 



Mesothontx and metatlioni.r each shorter than the prothorax, with a rather indis- 

 tinct fold on tlie middle. 



Abdoiiini subconical, composed of nine segments, nearly equal in length, the four 

 first gradually broader, the live last gradually narrower ; all except the last 

 very convex, with deep intersections, and marked with a deep fold on the 

 middle. The apical segment is semidiscoidal, rufescent, flat, and subcorneous 

 above, furnished on the under side with an extensile process. 



Lc'ia six, two on each thoracic segment, short, subconical and livid ; coxa robust ; 

 trochanters very small ; femora strong, cyliiidric ; tihiie as long as the three 

 preceding articulations, conic, and furnished with hairs ; tiirs) represented by a 

 long Bubulated claw, dilated beneath at the base, and furnished with a very 

 long bristle spatuliform at its extremity. 



PUPA. 



M. Perris does not give any detailed description of this stage ; he merely 

 makes the following observations : — 



" The nymph is at first white, afterwards rufescent. Its various parts are 

 closely wrapped together, and l)ut little elevated. The margin of the prothorax, 

 the sides, and the dorsal surface are covered with fine and very close hairs of 

 une(jual length. The extremity of the abdomen is entire, and almost smooth." 



LARVA OF ORTHOPEEUS. 

 L. c. 1-1 1 mm.— Body composed of twelve segments, elliptic, dejn-essed, livid- 

 white, paler on the under side, covered witli very minute tubercles regularly 

 arranged, bearing stout conical hairs forming a fringe at tlie sides ; thoracic segments 

 strongly developed, especially the first, marked with a transverse fold terminating 

 in a depression on each sidej giving the appearance of a double segment ; on the 

 prothoracic segment is a subquadratc brown spot, divided longitudinally by a white 

 line ; ahdominal segments short ; apical segment semiellipsoidal, furnished beneath 

 with a small extensile protuberance. 

 lle,id small, oval, livid-white, darker towards the base, furnished with a few hairs. 



